BSX SCS not working well enough. Please give me any helpful advice re; your xlif experience. In my case fusing 3 discs, l2/l3, l3/l4, l4/l5. I have significant scoliosis and spondolith, lots of degeneration. How bad/worse was pain and for how long, outcome successful?, how much rehab, what to avoid, what to emphasize? Thank you in advance.